diff --git a/executer/kernel/mcctrl/mcctrl.h b/executer/kernel/mcctrl/mcctrl.h
index 5b440cc0..f8362117 100644
--- a/executer/kernel/mcctrl/mcctrl.h
+++ b/executer/kernel/mcctrl/mcctrl.h
@@ -111,7 +111,6 @@ struct ikc_scd_packet {
 			int ref;
 			int osnum;
 			int pid;
-			int padding;
 			unsigned long arg;
 			struct syscall_request req;
 			unsigned long resp_pa;
@@ -124,6 +123,7 @@ struct ikc_scd_packet {
 			long sysfs_arg3;
 		};
 	};
+	char padding[12];
 };
 
 struct mcctrl_priv { 
diff --git a/kernel/include/syscall.h b/kernel/include/syscall.h
index 111edf07..1a107854 100644
--- a/kernel/include/syscall.h
+++ b/kernel/include/syscall.h
@@ -209,7 +209,6 @@ struct ikc_scd_packet {
 			int ref;
 			int osnum;
 			int pid;
-			int padding;
 			unsigned long arg;
 			struct syscall_request req;
 			unsigned long resp_pa;
@@ -222,6 +221,7 @@ struct ikc_scd_packet {
 			long sysfs_arg3;
 		};
 	};
+	char padding[12];
 };
 
 struct syscall_response {
diff --git a/kernel/syscall.c b/kernel/syscall.c
index 5c443d99..dae81b9c 100644
--- a/kernel/syscall.c
+++ b/kernel/syscall.c
@@ -129,7 +129,7 @@ static void do_mod_exit(int status);
 
 static void send_syscall(struct syscall_request *req, int cpu, int pid, struct syscall_response *res)
 {
-	struct ikc_scd_packet packet;
+	struct ikc_scd_packet packet IHK_DMA_ALIGN;
 	struct ihk_ikc_channel_desc *syscall_channel;
 	int ret;